Brush-holder.



Wu T. HENSLEY, BRUSH HOLDER.

APPLICATION FILED NOV. 8, 1907.

975g424. patented Nov. 15, 19m.

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WILLIAM T. HENSLEY, 0F WILKINSBURG, PENNSYLVANIA, ASSIGNOR, BY MESNE AS- SIGNMENTS, TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, 0F EAST PITTSBURG, PENNSYLVANIA, A CORPORATION 0F PENNSYLVANIA.

BRUSI-LHOLDER.

To all whom 'it may concern:

Be it known that I, WILLIAM T. HENSLEY, a citizen of the United States, and a resident of Wilkinsburg, in the county of Allegheny and State of Pennsylvania, have invented a new andy useful Improvement in Brush- Holders, ot which the following is a speciication. ,i p

My invention relates to brush-holders for' dynamo-electric machines, and it has for its object to provide a device ot this character thatsliall he especially simple and durable in construction and be adapted for use with machines of relatively small size.

Figure l ot the accompanying drawings a plan view, and Fig. Q is a sectional elevation of a device constructed in accordance with my invention, and Figs. 3 and 4 are detail views of parts of the brush-holder shown in the other figures.

Referring to the drawings, the structure here illustrated comprises a stationary rod or shaft 1, a clamping ring 2 which is se cured to the shattand is provided with a notched outer surface, a brush 3 and a sir'pporting arm t therefor which is rotatably mounted on the rod or shait l.

The supporting arm 4 is preferably punched out `of sheet brass or other suitable material and comprises two side portions 5 and 6, an end portion 7 to which the brush is secured and a air oi hub projections 8 wliichare rotatab y mounted on the rod or shaft l,

them.

A flexible electrical .connection is estabwith the. clamping ring 2 between lished between the clamping ring 2 and theV brush 3 by a connector or jumper 9 which may be formed of woven copper ribbon, or of other suitable material, the outer end 'of the connector or jumper being clamped in engagement with the brush by means of a bolt 10 which also serves to secure the brush to the outer end of the supporting arm.

A spiral spring 1l comprising two parts l2 is interposed between the rotatably mounted brush -supporting arm and the clamping ring Q. The inner extremities of the spring parts are fixed in slots 13 in the hubs 8 and the outer extremities are joined together by a cross strip 14 having a projection 15 which is adapted to engage the outer notchedsurface of the clamping ring. The teeth with Which'the clamping ring is Serial No. 401,272`

provided are of dinerent lengths, in order that they `may be readily engaged by the projection 15 as it is adjusted to vary the tension exerted by the spring.

The bolt l0 extends through a slot 16 which permits of substantially radial adjustment of the brush relative to the cominutator cylinder with which it is adapted to engage.

Since variations in the size and arrangementof parts may be effected within the scope of my invention, I desire that only such limitations shall be imposed as are in# dicated in the appended claims.

I claim as my invention:

l. A brush holder for dynamo-electric machines comprising a supporting rod or shaft, a ring provided with a plurality of peripheral projections and clamped to said rod or shaft, a double arm rotatably mounted on the rod or shaft at the respective sides of said ring, and having a, brush secured to its outer extremity, a spiral spring surrounding said rod or shaft and having its inner end fastened to the brush arm, and means` attached to the outer end ot the spring to engage any one of the projections of the clamping ring in accordance with the spring pressure desired.

Q. A brush-holder for dynamo-electric machines comprising a supporting rod or shaft, a clamping ring secured to the shaft and having a notched. outer surface, an 'arm lrotatably mounted on the rod or shaft, and

a double spiral spring interposed between f the arm and the rod.

3. A brush-holder for dynamo-electric machines comprising a supporting rod or shaft, a clamping ring secured to the rod or shaft. 4and having a notched surface, a double arm rotatably mounted on the rod or shaft and having its side members located at opposite sides ol the clamping ring, and a two-part spiral spring having its inner end secured to the arm and itsouter end adjustably secured to the clalnipin@r ring.

el. A rush-holder for dynaino-electric machines comprisiiig a rod or shaft, a clamping ring secured thereto and having a notched outer surface, a sup orting arm rotatably mounted on the ro or shaft and having a brush located at its outer extreml ity, said arm comprising side portions, an 1 end portion to which the brusi is secured Patented Nov. 15, 1910.

IOS

and a pair of hub projections mounted 011 n testimony whereof, have heleuno the rofol shaft, and a two-part spiral subscribed my name this 30th day of Oct.,

spring the inner extremities of which are Se- 1907, cured to the hubs of the supporting arm and XVILLAM T. HENSLEY.

the outer extremities of which are joined by /Titllesses:

a cross strlp adapted to engage the notches CARL F. LAMBERT,

on the outer surface ofthe clamping rng. BIRNEY EINES. 

